GL_ANGLE_multiview has been renamed to GL_OVR_multiview2.

changes include:
1) GL_OVR_multiview to GL_OVR_multiview2 extension directive change
2) Removal of all references to side by side. We no longer support multiple views in a single 2DTexture. Only 2DTextureArray's are supported
3) WebGL 2 (ES3) is required for multiview

Bug: angleproject:3341
Change-Id: Ie0c1d21d7610f8feebdb2e4d01c6947f57e69328
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1552023
Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/compiler/translator/Initialize.cpp b/src/compiler/translator/Initialize.cpp
index e362edb..aec19c9 100644
--- a/src/compiler/translator/Initialize.cpp
+++ b/src/compiler/translator/Initialize.cpp
@@ -61,9 +61,9 @@
     {
         extBehavior[TExtension::ARM_shader_framebuffer_fetch] = EBhUndefined;
     }
-    if (resources.OVR_multiview)
+    if (resources.OVR_multiview2)
     {
-        extBehavior[TExtension::OVR_multiview] = EBhUndefined;
+        extBehavior[TExtension::OVR_multiview2] = EBhUndefined;
     }
     if (resources.EXT_YUV_target)
     {